/*
 * Copyright (c) 2011 Imre Fazekas.
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the Brillien nor the names of its
 * terms and concepts may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package com.vii.streamline.jsonrpc;

import com.vii.streamline.json.JsonRpcListener;
import com.vii.streamline.json.JsonRpcRequest;
import com.vii.streamline.json.JsonRpcResponse;
import com.vii.streamline.services.error.StreamLineException;
import com.vii.streamline.services.reflection.Invocation;
import com.vii.streamline.services.reflection.ReflectionInvocationManager;
import com.vii.streamline.services.reflection.ReflectionReference;
import org.slf4j.Logger;

import java.lang.reflect.Method;
import java.util.List;
import java.util.Map;

import static com.vii.streamline.json.JsonRpcServices.ERROR_INTERNAL_ERROR;


/**
 * Specialized {@link JsonRpcListener} implementation for reclection-based calls.
 */
public class ReflectionJsonRpcListener extends JsonRpcListener {

    protected ReflectionInvocationManager manager;

    public ReflectionJsonRpcListener(boolean ssoRequired, Logger logger, Map<String, ReflectionReference> references) throws StreamLineException {
        super(ssoRequired, logger);
        manager = new ReflectionInvocationManager( logger, references );
    }

    @Override
    public boolean isMethodReckognised(Invocation invocation) {
        return manager.isMethodReckognised( invocation );
    }

    @Override
    public boolean hasMessageProcessorReturnValue( Invocation invocation ) throws StreamLineException{
        return manager.hasMessageProcessorReturnValue(invocation);
    }

    @Override
    public List<String> getParameterNames( Invocation invocation ) throws StreamLineException {
        return manager.getParameterNames(invocation);
    }

    @Override
    public List<Class> getParameterTypes( Invocation invocation ) throws StreamLineException {
        return manager.getParameterTypes(invocation);
    }

    @Override
    public Map<String, Class> getParameterMap( Invocation invocation ) throws StreamLineException {
        return manager.getParameterMap(invocation);
    }

    @Override
    protected JsonRpcResponse call(String sessionId, JsonRpcRequest jsonRpcRequest) {
        try {
            validateSessionId( sessionId );

            Invocation inv = new Invocation( sessionId, jsonRpcRequest.getMethod() );

            Object payload = call( inv, jsonRpcRequest );

            JsonRpcResponse response = JsonRpcResponse.createResponse( jsonRpcRequest, payload );

            logger.debug(
                "Response received: " + response
            );

            return response;
        } catch (Exception e) {
            logger.error( e.getMessage(), e );
            //throw new StreamLineException( ERROR_INTERNAL_ERROR.getCode(), ERROR_INTERNAL_ERROR.getMessage(), e.getMessage() );
            return JsonRpcResponse.createResponse( jsonRpcRequest, ERROR_INTERNAL_ERROR.getCode(), ERROR_INTERNAL_ERROR.getMessage(), e.getMessage() );
        }
    }

    /**
     * Calls a {@link Method} based on the given JsonRpc call.
     */
    protected Object call( Invocation inv, JsonRpcRequest json ) throws StreamLineException {
        try {
            inv.setMethod( json.getMethod() );
            inv.setParameters( (Map<String, Object>)json.getParams() );

            return manager.execute( inv );
        }catch(Exception e) {
            e.printStackTrace();
            throw new StreamLineException( ERROR_INTERNAL_ERROR.getCode(), ERROR_INTERNAL_ERROR.getMessage(), e.getMessage() );
        }
    }

}
